package com.example.yls.demoa;

import android.media.MediaPlayer;
import android.os.Handler;
import android.os.Message;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.SeekBar;
import android.widget.TextView;

import java.io.IOException;

public class MainActivity extends AppCompatActivity {
private Button buttonStart;
private Button buttonPause;
private Button buttonStop;
private MediaPlayer mediaPlayer=new MediaPlayer();
private boolean isPause=false;
private SeekBar seekBar;
private TextView textCurrentTime;
private TextView textTotalTime;
private Handler handler;
    private static final int MSG_PROGRESS_CHAGED = 1001;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        buttonStart=findViewById(R.id.btn_start);
        seekBar=findViewById(R.id.seekBar);
        textCurrentTime=findViewById(R.id.text_currentTime);
        textTotalTime=findViewById(R.id.text_totalTime);
        handler=new Handler(new Handler.Callback() {
            @Override
            public boolean handleMessage(Message message) {
                if(message.what==MSG_PROGRESS_CHAGED){
                    int position=message.arg1;
                    int duration=message.arg2;
                    textCurrentTime.setText(getTimeStr(position));
                    textTotalTime.setText(getTimeStr(duration));

                }



                return false;
            }
        });
        seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
            @Override
            public void onProgressChanged(SeekBar seekBar, int i, boolean b) {

            }

            @Override
            public void onStartTrackingTouch(SeekBar seekBar) {

            }

            @Override
            public void onStopTrackingTouch(SeekBar seekBar) {
                    int progress=seekBar.getProgress();
                    int duration=mediaPlayer.getDuration();
                    int position=duration*progress/100;
                    mediaPlayer.seekTo(position);
            }
        });
        new Thread(new Runnable() {
            @Override
            public void run() {
              while (true){
                  if(mediaPlayer.isPlaying()){
                    int duration=mediaPlayer.getDuration();
                    int position=mediaPlayer.getCurrentPosition();
                    int progress=position*100/duration;
                    seekBar.setProgress(progress);
                    Message message=new Message();
                    message.what=MSG_PROGRESS_CHAGED;
                    message.arg1=position;
                    message.arg2=duration;
                    handler.sendMessage(message);


                  }
                  try {
                      Thread.sleep(1000);
                  } catch (InterruptedException e) {
                      e.printStackTrace();
                  }
              }
            }
        }).start();
        buttonStart.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View view) {

                if (mediaPlayer == null) {
                    mediaPlayer = new MediaPlayer();
                }
                if (isPause) {
                    mediaPlayer.start();
                    isPause=false;
                } else {
                    try {
                        mediaPlayer.reset();
                        mediaPlayer.setDataSource("/mnt/shared/Other/xiaoqingwa.mp3");
                    } catch (IOException e) {
                        e.printStackTrace();
                    }

                    mediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
                        @Override
                        public void onPrepared(MediaPlayer mediaPlayer) {
                            mediaPlayer.start();
                        }
                    });
                    mediaPlayer.prepareAsync();
                }
            }
        });
        buttonPause=findViewById(R.id.btn_pause);
        buttonPause.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if(mediaPlayer!=null&&mediaPlayer.isPlaying()){
                    mediaPlayer.pause();
                    isPause=true;
                }
            }
        });
        buttonStop=findViewById(R.id.btn_stop);
        buttonStop.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if(mediaPlayer!=null&&mediaPlayer.isPlaying()){
                    mediaPlayer.stop();
                }

            }
        });

    }
    private String getTimeStr(int time) {
        int second = time / 1000;
        int min = second / 60;
        second = second % 60;

        StringBuffer buffer = new StringBuffer();
        if(min < 10){
            buffer.append("0");
        }

        buffer.append(min);
        buffer.append(":");

        if(second < 10){
            buffer.append("0");
        }
        buffer.append(second);

        return  buffer.toString();
    }
}
